Combined type-writing and computing machine.



E. C. EACHEL.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FlLED JULY 3. 1913.

1 ,259,497. Patented Mar. 19, 1918 UNITED STATES PATENT OFFICE.

EMERSON C. EACHEL, OF MONTCLAIR, NEXV JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y.. A

CORPORATION OF NEW YORK.

\ COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Application filed July 3, 1913.

To all whom it may concern:

Be it known that I, Emnzsox C. Eixcnnn, a citizen of the United States, residing in Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Combined Type-\Vriting and Computim Machines, of which the following is a specification.

This invention relates to computing machines of the kind in which figures are printed as the numeral keys are struck, and the invention relates more particularly to means for printing the numbers on the worksheet without computing the same.

According to the present invention, the numeral keys may be operated to print the figures and compute the number in the ordinary way; but at any time a special key may be depressed which will disconnectthe computing mechanism from the keys, so that the latter will print without computing; but this printing will not be done with the same types that are used when computing is being done. By means of said special key, the computing mechanism will be disconnected or silenced, and the numeral keys, if operated, will print the number on the work sheet in types which are essentially different from the types that are used at the computing operation.

This invention is shown applied to an Underwood-Hanson combined typewriting and computing machine, in which, at the operation of the numeral keys, index pins are set up one after another; and at the conclusion of the writing of the number, a general operator is brought into use to carry into the adding wheels the number which has been so set up on the index pins.

This index-pin controlling mechanism includes a dog which is mounted on the paper carriage of the typewriter, for selecting the denomination of the index-pin; and upon depressing a special key, said dog is silenced, so that the numeral keys of the typewriter may be operated without setting any index pins, or performing any computation.

The same dog-silencing key also shifts the case-shift mechanism of the typewriter, so as to put the computing types out of use and bring into play the set of special types which are distinctive therefrom. Hence at any time a number may be written on the Work-sheet without computing, even though Specification of Letters Patent.

Patented Mar.

Serial No. 777,137.

the carriage is in the computing zone; and a further advantage is gained, that the nun1- her which is so written without computing, appears upon the work-sheet in a distinctive type from numbers which are computed; so that danger of error is avoided.

Preferably each of the figure type bars on the Underwood,machine is made with a large-faced figure type and a smalhfaced figure type; the large-faced figure type be ing in the lower-ease set, so as to he used when computing; while upon depressing the shift key the platen'is shifted up to bring into use the small types, and at the same time the computing mechanism is lemporarily disconnected from the computing keys.

In the accompanying drawings,

Figure l is a perspective view of a fragment of a type bar on which is mounted a double type.

Fig. 2 is a diagrammatic view to show the operation of the case-shift mechanism and the computing disconnection mechanism.

Fig. 3 is a sectional side elevation of a combined typewriting and computing machine of the Underwoodl lanson type, show ing the parts in normal positions, and showing in dotted lines a computing type in printing position.

Fig. 4 shows the types on the ends of the type bars.

Fig. 5 shows a plan of the numeral keys which operate the types seen at Fig. 4:, said keys being unprovided with extra characters, contrary to the usual custom in single-shift typewriting machines.

The typewriting machine comprises alphabet keys 1 and numeral keys 2, all of the keys connected to levers 3, which, by means of bell cranks at, swing type-bars 5 up against a platen 6. The platen is mounted on a carriage 7 which has a letter-feeding rack 8 connected by means of a pinion 9 with an escapement wheel 10, the latter 00- operating with feeding dogs 11 controlled by a universal bar 12 operated by the typebars, whereby the carriage is fed step by step as the writing proceeds. Each numeral key 2 has a stem 13 which depresses an arm 14-, of which there is one for each key, as usual in the Hanson writing niachine; these arms mounted on rock shafts 15 which carry arms 16 pivoted to links 17,

each of the latter forming a part of a linkage, the linkages being designated generally as 18, and being in position to depress index pins 19. These index pins are normally beyond the reach of the key-operated linkages 18, but upon the typewriter carriage 7 is a dog 20 which one by one lifts levers 21 pivoted at 22 to depress links 23 and rock levers 24, which, by means of the usual transposition device 25, lift therear ends of bars 26 by which said index pins are carried, whereby the index pins are brought into reach of the key-operated linkages 18. These bars 26 are raised one after another, thus bringing each file of index pins successively within reach of the key-operated linkages 18, whereby the operation of the numeral keys 2 to print causes the corresponding number to be set up upon the index. pins, of which there are usually eightyone, there being usually nine of the bars 26.

After the number is written, and the corresponding pins are accordingly-set, a general operator is brought into use. This general operator comprises a cross bar 28 which immediately underlies the index pin bars 26 so as to carry forward all of the bars 26 on which pins have been set by the keys 2; andby means of racks ward ends of these bars 20, pinions 30 are rotated accordingly, andthe number wheels 31 are turned with them, said bars 27 formpart of the general operator. The gen- :ral operator is usually driven by means of a rock shaft 32 hax ing segments 33, which, by means of pinions 34, control racks 35 on side bars 27 at the opposite sides of the machine. Thus the writin of the numbers in a column may proceed line by line, and after each number"is written the adding wheels 31 may be turned a corresponding amount.

Sometimes in beginning a column it is desired to write a number without having it carried into the adding wheels 31; and in that case the operative depresses a special key 36, which is mounted on the forward end of a lever 37, pivoted upon the same rod 38 as the lovers 3 and having a similar returning spring 39, and also having an upstanding rock' arm 40 which rocks forwardly and swings up an arm 41 depending from a rock shaft 42; the latter also having a rearwardly extending arm 43 which carries at its rear end a roll. 44, that now runs down along a cam. arm 45 depending from a rock shaft 46, and swings said arm forwardly, while an upstanding arm 47, rising from the same rock shaft, is swung rearwardly, and a supporting roll 48 at thetop of said arm 47 is withdrawn, so that the mount 49 which is normally supported by said roll 48 and which carries said denomination-selecting dog 20, is allowed to drop, swinging down about a rod 50 which is provided upon 29 on the forthe carriage 7. The positions of the parts at this moment are indicated at Fig. 2, in which it will be seen that the dog 20 can no longer operate any of the denomination jacks or levers 21. The mount 49, as usual, carries a roll 51 which rests upon the supportin roll 48; this roll 51 being beveled to facilitate the subsequent return of the parts to normal position.

.When the silencing key 36 is held down, the operative may depress the numeral keys 2; at this time the types 52 will be out of use, for the reason that the arm 41 is connected to a shift rail 53 to lift the same, together with a roll 54 running thereon, and connected to a shift frame 55 on the paper carriage 7 whereby said shift frame is lifted, together with the platen 6, so high, as at Fig. 2, that the large types 52 cannot print, but the small figure types 56 are caused to strike the platen, thus making very much smaller characters than those which are written at the time that the adder-silencing and case-shift key 36 is in normal Fig. 1 pos tion.

Hence the operation of printin numbers without computing is facilitated by a very simple and inexpensive means, and the further advantage is gained that the writing shows for itself that the number was not carried into the computing wheels 31.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

I.'In a combined typewriting and computing machine, the combination of a single set of numeral keys; two sets of alternatively-usable numeral types directly actuable by said keys and arranged in pairs, one pair individual to each numeral ey to be operated thereby, being constructed to always write the same numeral at the operation of the corresponding key, but the impression written by one type of the pair havin a distinctly iflerent appearance from t at written by the other type of the pair, whereby the actual appearance of each number itself as written on the work-sheet will be self-indicative of the particular set of types by which it was written, all bf the types in all of the pairs being mounted to strike at a ,single printing point; computing mechanism 0 eratively associated with said keys, to controlled thereby, solel when one definite set of types is operate by said keys; and means for simultaneousl causin the other set of types to strike at t 1e operation of said keys and silencing said computing mechanis'nil 2. In a combined typewriting and computing machine, the combination, with a carriage, and computing mechanism having a, part controlled by said carriage; of

both types of each pair a single set of numeral keys controlling the travel of said carriage and operatively assoiated with said computing "mechanism; two sets of alternatively-usable numeral types directly actuable by said keys to strike at a single printing oint and arranged in pairs, one pair indivi ual to each numeral key to be operated thereby, both types of each pair being constructed to always write the same numeral, but the impression written lily one type of the pair having a distinctly di erent appearance from that written by the other type of the pair, whereby the actual appearance of each number itself as written on the work-sheet will be self-indicative of the particular set of types by which it was written, one of said sets of numeral types being normally ineffective at the type strokes; and a shift key connected to render effective at the key strokes the said ineffective set of numeral types and to simultaneously silence the computing mechanism.

3. In a combined typewriting and computing machine, the combination of a single set of numeral keys, operable one after another to typewrite, two sets of alternatively-efiective numeral types connected to said keys to be directly actuated thereby,

and all arranged to strike at a single print ing point, said types arranged in pairs, one pair individual to'each numeral key, both types of each pair being formed for always writing the same numeral at the operation of the corresponding key, but the impression written by one type of the pair having a distinctly different appearance from that written by the other type of the pair, Whereby the actual appearance of each numeral itself as written on the work-sheet will be self-indicative of the particular kind or set of types by which it was written, computing mechanism operatively associated with said keys to be cont-rolled thereby'at the successive type-striking operations of said keys, while efi'ectively operating one set of said numeral types, means for varying the state ofsaid computing mechanism at the key operations, and means connected with sald varying means for bringing .into effective operation at the key strokes the other set of said numeral types.

EMERSON C. EACHEL.

Witnesses:

W. L. DEUQH, LOUISE D. MAIER. 

